Education agents in Australia are not required to be registered unless they intend to provide immigration assistance. If you do provide immigration assistance, you must register as a migration agent with the Migration Agents Registration Authority (the MARA).
See: Becoming an Australian Registered Migration Agent (Who needs to register)
If you are unsure whether your activities as an education agent require you to register as a migration agent with the MARA please complete the Agent Enquiry & Feedback form.
See: Agent Enquiry and Feedback